diff --git a/components/case/representation/representationElements.js b/components/case/representation/representationElements.js
index 3e793654..bace3666 100644
--- a/components/case/representation/representationElements.js
+++ b/components/case/representation/representationElements.js
@@ -288,7 +288,7 @@ export const RenderCondtionalRadioList = ({
 
                     <div id={id + "-hint"} className="govuk-hint">
                         e.g. "Owners of Numbers 1-5 High Street", or "Mr and Mrs
-                        Smith" or "The executors of Mr Evans" estate"
+                        Smith" or "The executors of Mr Evans' estate"
                     </div>
                     <div className="govuk-radios">
                         {Object.keys(options).map((key, index) => (
@@ -341,6 +341,7 @@ export const RenderCondtionalRadioList = ({
                                                     name={id + "_details"}
                                                     component="input"
                                                     type="text"
+                                                    validate={[required]}
                                                 />
                                             </div>
                                         </div>